Ms. Liu, who is in her 30s, hurried into my office with her 4-year-old child and pointed to the rash on the child’s feet and said anxiously, “Doctor, what’s going on? It happened last year at this time, and it’s happening again these days, and the child can’t stop scratching. It turned out that the child had a number of erythematous papules on his lower legs and the back of his feet, some of which had blisters in the center. After asking a few questions, I told her that it was papular urticaria and gave a brief introduction to the situation of papules. The summer season is as hot as fire, but it is also a high incidence of skin diseases, and papular urticaria is one of the common and frequent skin diseases after the summer. We often refer to papular urticaria as papular urticaria, the scientific name is also known as acute itchy rash or acute simple itchy rash, urticarial moss, infantile moss or itchy infantile moss, common in infants and children, but also in adults, mainly women. It is a seasonal skin disease characterized by pruritic, pimple-like papules or pimple-like herpes, commonly known as “earth wind sores”. The occurrence of papules is mostly related to the bite of certain insects, such as lice, fleas, mosquitoes, mites and bedbugs and other arthropods that bite the skin and inject saliva, and some substances in the saliva act as antigens to cause lesions and itching in allergic people. In addition, it may also be related to intestinal parasites and certain foods. The disease has several characteristics: First, it is seasonal. It is easy to develop in spring, summer and autumn. Second, it is a specific site. It occurs in the lower back, abdomen, buttocks, calves, and mostly in some exposed areas. The third is the rash characteristics. The lesion is a red papule, fusiform or round or oval, often with papules, blisters or blisters at the center. After scratching, vesicles and crusts may appear, causing secondary infection. Fourth, there is no systemic manifestation and the local lymph nodes are not enlarged. The duration of the disease is generally 7-10 days, and the rash may leave temporary hyperpigmentation after fading, which can recur if the cause is not removed, making the disease prolonged and difficult to heal. Simply put, the disease occurs mainly due to two factors, one is external factors, such as insect bites; the other is internal factors, the patient is allergic, or has gastrointestinal diseases. Therefore, in the treatment of the external use of glyburide lotion to stop itching and protect the skin of the lesions, it is also necessary to take oral antihistamines, such as cycloheximide, cetirizine, loratadine, etc. The secondary infection should be taken internally and externally with anti-infective drugs. For recurrent cases, the treatment can be combined with traditional Chinese medicine, and Jing Fang Tang is often added and reduced to clear heat, remove wind and relieve itching. Infants and children with more lesions can take a bath with a decoction of some herbs to dispel wind and relieve itching. In terms of personal protection, the main thing is to actively search for and remove the cause of the disease and suspected triggering factors, improve environmental and residential hygiene, avoid insect bites, and avoid scratching to prevent secondary infection.